<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" v-for="item of hot" :key="item.id">
						<div class="button" @click="handleCityClick(item.name)">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area" 
			v-for="(item,key) of cities"
			:ref="key"
			:key="key"
			>
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div 
					class="item" 
					v-for="val of item" 
					:key="val.id"
					@click="handleCityClick(val.name)"
					>{{val.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'	
import { mapState,mapMutations } from 'vuex'
export default {
	name: 'CityList',
	props: {
		'cities': Object,
		'hot': Array,
		'letter': String
	},
	data(){
		return {
			state:null
		}
	},
	computed:{
		...mapState({
			currentCity: 'city'
		})
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.wrapper,{click:true})
	},
	methods: {
		handleCityClick(city){
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	watch: {
		letter (){
			if(this.letter){
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	}
}	
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.list
	overflow: hidden
	position: absolute
	top: 1.55rem
	left: 0
	right: 0
	bottom: 0
	.border-topbottom
		&:before
			border-color:#ccc
		&:after
			border-color:#ccc
	.title
		line-height: .44rem
		background: #eee
		padding-left: .2rem
		color:#666
		font-size: .26rem
	.button-list
		overflow: hidden
		padding: .1rem .6rem .1rem .1rem
		.button-wrapper
			float:left
			width: 33.33%
			.button
				margin: .1rem
				padding: .1rem 0
				text-align: center
				border: 0.02rem solid #ccc
				border-radius: .06rem
	.item-list
		.item
			line-height: .76rem
			padding-left: .2rem						
</style>